33070-32-5Relevant academic research and scientific papers
Deprotonation-Triggered Heavy-Halogen Migrations as a Key to the Structural Elaboration of 2,2 -Difluoro-1,3-benzodioxole
Gorecka, Joanna,Leroux, Frederick,Schlosser, Manfred
, p. 64 - 68 (2004)
Although proton abstraction from the 4-position of 2,2-difluoro-1,3-benzodioxole occurs with exceptional ease, lithiation of the more-remote 5-position can only be brought about if no oxygen-adjacent site remains unoccupied. Thus, unlike 4-bromo-2,2-diflu
Fluorodesulfurization of Thionobenzodioxoles with Silver(I) Fluoride
Newton, Josiah J.,Brooke, Alan J.,Duhamel, Bastian,Pulfer, Jason M.,Britton, Robert,Friesen, Chadron M.
, p. 13298 - 13305 (2020/11/26)
Difluorobenzodioxole is an important functional group found in both pharmaceuticals and agrochemicals. The late-stage introduction of this functional group is challenged by typical fluorination conditions of HF and strong oxidants. Here, we demonstrate that a range of difluorobenzodioxoles can be prepared from catechols in two steps through conversion into thionobenzodioxoles, followed by desulfurative fluorination with silver(I) fluoride. These mild reaction conditions are compatible with a variety of functional groups and enable access to a range of functionalized difluorobenzodioxoles.
Synthesis method of (2,2-difluorobenzo[d][1,3]dioxy-5-yl)methanol
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Paragraph 0042-0044, (2019/04/04)
The invention discloses a preparation method of (2,2-difluorobenzo[d][1,3]dioxo-5-yl)methanol as a fine chemical intermediate. The method is simple and feasible, lower in cost, and suitable for preparing (2,2-difluorobenzo[d][1,3]dioxo-5-yl)methanol through industrial production.
PROCESS FOR THE PREPARATION OF DERIVATIVES OF BENZODIOXOLE
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Page/Page column 9-10, (2017/04/11)
The present invention relates to the process for preparing compounds of Formula I, Formula III and Formula V.
PROCESS FOR THE PREPARATION OF HALOGENATED DERIVATIVES OF AROMATIC ETHERS
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Page/Page column 4, (2016/04/20)
The present invention relates to the process for the preparation of halogenated derivatives of aromatic ethers.
Process for preparing 5-bromo-2,2-difluorobenzo-1,3-dioxoles
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Page/Page column 2, (2008/06/13)
The invention relates to a process for preparing 5-bromo-2,2-difluorobenzo-1,3-dioxoles and to the use thereof for preparing medicaments and crop protection agents.
Process for the preparation of 5-bromo-2,2-difluorobenzo-(1,3)-dioxoles
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Page/Page column 4, (2008/06/13)
Preparation of 5-bromo-2,2-difluoro-benzo[1,3]dioxole compounds (I) comprises reacting 2,2-difluoro-benzo[1,3]dioxole compounds (II) with bromine in the presence of at least two Friedel-Crafts catalysts, one of the catalyst being hydrogen fluoride. Preparation of 5-bromo-2,2-difluoro-benzo[1,3]dioxole compounds of formula (I) comprises reacting 2,2-difluoro-benzo[1,3]dioxole compounds of formula (II) with bromine in the presence of at least two Friedel-Crafts catalysts, one of the catalyst being hydrogen fluoride. R 1>1-4C alkyl, Br, Cl or F; and n : 0-1. [Image].
Herbicidal benzodioxoles and benzodioxanes
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, (2008/06/13)
Compounds of Formula I, and their N-oxides and agriculturally-suitable salts, are disclosed which are useful for controlling undesired vegetation STR1 wherein: STR2 T is O or S; W is a single bond, O, S or NR6 ; X is N or CH; Y is N or CH; Z is
Benzoheterocyclyl ketone hydrazone insecticides
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, (2008/06/13)
Benzoheterocyclyl ketone hydrazones of the formula STR1 in which Y is methylene, difluoromethylene or oxygen and n is 0 or 1, compositions thereof and their use as insecticides are disclosed and exemplified.
